Question:
“The influence of both the alleles in a heterozygous state is clearly expressed in codominance.” Explain with the help of inheritance of ABO blood group in humans.
“The influence of both the alleles in a heterozygous state is clearly expressed in codominance.” Explain with the help of inheritance of ABO blood group in humans.
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Codominance allows the expression of both alleles simultaneously, demonstrating a unique pattern of inheritance.
Updated On: Mar 21, 2026
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Solution and Explanation
Codominance is observed when both alleles in a heterozygous state express equally.
Example: ABO blood group inheritance.
IA and IB alleles: These are codominant, while the i allele is recessive.
A person with the IAIB genotype has an AB blood group because both IA and IB are expressed.
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